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Based on the previous "Beam on Solid State Fusor" design I have worked out a new more sophicticated design, now. It is similar, but the remarkable significant diffence is, that the target, which gets bombarded with deuterium ions, is out Palladium-Lithium alloy now.

Small alloy test charges are usually manufacured under labaratory conditions using a high-frequency induction heater . To manufacture a Pd-Li alloy you have to use additional flux, that covers up the Li-material, before you can melt it. As Lithium is a combustible light-metal it would start burning in the air, otherwise.

With the modification I get the following low budget design for an "Beam on Pd-D-Li Target Fusor":

Manufacturing an Palladium-Lithium electrode like mentioned above

Take a television tube from a bigger old school TV / CRT Monitor

Let the vacuum out

Cut a round! "service whole" into the television tube using a glas cutter (cornered holes will make the glass crack under vacuum)

Manufacturing an electrolytical cell, that will be filled with D2O, that has a prolonged electrode out of Pd-Li sheet on that side, where the deuterium is generated

The whole electrolytical cell is placed into the television tube

The televisons tube's electron generation unit's polarization is reversed and the voltage is increased, so that it produces a ion beam instead of an electron beam, now, when there is plasma in the tube

The prolonged Pd-Li-electrode is positioned at the Zero-beam position of the television tube

The tube's beam generation units and the electrolytical cell get powered; the electrolytical cell starts to produce deuterium, that gets stored as palladium-deuterium-ligand within in the electrode

The television tube is set under vaccuum. Due to the vaccum, some of the deuterium in the palladium electrode evaporades into the tube. A deuterium plasma is generated in the tube. From the deuterium plasma the tube's beam unit starts to produce a deuterium-ion beam.

Thus, the palladium-lithium-deuterid-ligand in the prolonged electrode gets bombarded with deuterium-ions

The Lithium in the Pd-Li electrode gets fissioned into tritium and helium

The bombardment of the tritium with deuterium ions startes a D-T fusion process

Remarks
From my point of view, this deuterium-tritium fusion process is not too dangerous, because

No direct toxic tritium gas is required,

most of the tritium, that is generated from lithium fission, gets bound to the palladium electrode (as deuterium and simple hydrogen do)

the tritium remains within a sealed (television) vacuum tube

additonally the whole gadgetry will be build within a fume cupboard to make sure no tritium gets to room air

The reverse of the polarization of the television-tube's "cathode"-ray unit may not be suitable or not powerful enough to accelerate deuterium-ions to 2 keV or even 4keV

An experimental vacuum chamber, that already posses a "service hole" may be much more handy

The setup requires a tritium neutralisation concept and a fume cupboard. Although tritium is only a beta-emitter, the inhalation of tritium gas can cause serios bioaccumulation. However, a radiotoxic substance can be handled in laboratory more easily than a chemotoxic substance, because it can always be easiliy detected (using a Geiger counter).

The risk of producing a uncontrolled self-sustaining fusion reaction is estimated low, as the necessary activation energies of the nuclear fusion reaction are high. Especially, a chain reaction reaction does not seem possible, as far the target is small (e.g. 0.1 g) and the activation is not accomplished by a big simultanous "bang".

The television tube is set under vaccuum. Due to the vaccum, some of the deuterium in the palladium electrode evaporades into the tube. A deuterium plasma is generated in the tube. From the deuterium plasma the tube's beam unit starts to produce a deuterium-ion beam.

You are absolutely right. Only vacuum does not make a plasma, automatically. However, a full plasma is not required. Some ionized deterium ions next to reversed polarity "cathode ray" unit will be enough.

Any suggestions, how to best/ easierst create the deuterium ionization next to the reversed polarity "cathode ray"unit?

However, my current main problem is, I simply do not find a big demountable "cathode ray" tube.

i"ve tried various oscilloscope tube as they produce a single beam (not 3 like a color TV)
it`s also easier to cut the glass around the cathode area and its possible to find old cheap oscilloscope
you may even be able to use the flyback transformer.
Given a good vacuum pump, seal etc.. you can even adjust the ion beam direction !

Unless you have used Simion or similar what makes you think that a set of lenses designed for electrons would work for protons or dueterons .
The proton is 1837 times heavier than the electron dueterons even heavier

Thanks for the oscilloscope tip, Vince! How did you cut the tube exactly?

John, ion beam distraction by electric field is not required, here. I wanted to use the null-posiition of the beam. You might be right this way, that the maximum ion acceleration by the default voltage of the scope might be to low. However a higher voltage might be possible, depending on the tube.

that is true John but i did not think Harald wanted to used them as a tight focused beam.. but all the connections are already there for higher or lower voltage or whatever needed...
i have a friend who own a shop and works on glass as a professional , he was the one who cut the tube, attach vacuum connectors and cured the glass etc.. He might have simply used a glass cutter ...

i guess he could ...he has done many custom glass work for me over the years...you could deal with him directly not sure about shipping tho
Superior glass Blowing (734) 482-8744 just call and explain what you need if he is not too busy ..